or our laws do not allow the fbi to follow-up in a sound, solid way. there was a lot to be learned from this guy. he was on websites talking about killing americans. he went overseas, as chuck indicated. he was clearly talking about radical ideas. he was visiting radical areas. it's people like this that you don't want to let out of your sight. and this was a mistake. i don't know if our laws are insufficient or the fbi failed, but we're at war with radical islamists and we need to up our game. >> the chairman of the house homeland security committee is also weighing in on this topic. he told our candy crowley that tamerlan tsarnaev received what he called training while in russia and he thinks tsarnaev made more than one trip to the region. we are learning more about the suspects from the russian republic of dagestan where they once lived. cnn can exclusively reveal alleged boston bomber tamerlan tsarnaev, the older brother, had video of jihadists on his youtube channel. let's check in with cnn's phil black in moscow. phil, what do you know about this